diff --git a/.scrutinizer.yml b/.scrutinizer.yml
index 42617ac8..3c0ca63d 100644
--- a/.scrutinizer.yml
+++ b/.scrutinizer.yml
@@ -21,7 +21,7 @@ checks:
 tools:
     external_code_coverage:
         timeout: 600
-        runs: 3
+        runs: 4
     php_code_sniffer:
         enabled: true
         config:
diff --git a/.travis.yml b/.travis.yml
index d3d390c1..311b6ad1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,11 +1,10 @@
 language: php
 
-sudo: false
-
 php:
   - 7.1.3
   - 7.1
   - 7.2
+  - 7.3
   - nightly
 
 matrix:
diff --git a/composer.json b/composer.json
index a340ea3d..ca7d08f5 100644
--- a/composer.json
+++ b/composer.json
@@ -15,6 +15,7 @@
     "license": "MIT",
     "require": {
         "php":               ">=7.1.3",
+        "ext-json":          "*",
         "psr/log":           "~1.0",
         "arcanedev/support": "~4.3.0"
     },
diff --git a/src/Commands/CheckCommand.php b/src/Commands/CheckCommand.php
index aca4acd9..21f5f389 100644
--- a/src/Commands/CheckCommand.php
+++ b/src/Commands/CheckCommand.php
@@ -99,7 +99,9 @@ private function displayMessages()
             $rows[] = [$file, $message];
         }
 
-        $this->frame('LogViewer messages');
-        $this->table(['File', 'Message'], $rows);
+        if ( ! empty($rows)) {
+            $this->frame('LogViewer messages');
+            $this->table(['File', 'Message'], $rows);
+        }
     }
 }
diff --git a/src/Utilities/LogChecker.php b/src/Utilities/LogChecker.php
index 0d6afd2c..e82146aa 100644
--- a/src/Utilities/LogChecker.php
+++ b/src/Utilities/LogChecker.php
@@ -268,16 +268,17 @@ private function checkLogFile($path)
         $status   = true;
         $filename = basename($path);
         $message  = "The log file [$filename] is valid.";
+        $pattern  = $this->filesystem->getPattern();
 
         if ($this->isSingleLogFile($filename)) {
-            $this->status = $status  = false;
+            $this->status = $status = false;
             $this->messages['files'][$filename] = $message =
                 "You have a single log file in your application, you should split the [$filename] into separate log files.";
         }
-        elseif ($this->isInvalidLogDate($filename)) {
-            $this->status = $status  = false;
+        elseif ($this->isInvalidLogPattern($filename, $pattern)) {
+            $this->status = $status = false;
             $this->messages['files'][$filename] = $message =
-                "The log file [$filename] has an invalid date, the format must be like laravel-YYYY-MM-DD.log.";
+                "The log file [$filename] has an invalid date, the format must be like {$pattern}.";
         }
 
         $this->files[$filename] = compact('filename', 'status', 'message', 'path');
@@ -299,13 +300,12 @@ private function isSingleLogFile($file)
      * Check the date of the log file.
      *
      * @param  string  $file
+     * @param  string  $pattern
      *
      * @return bool
      */
-    private function isInvalidLogDate($file)
+    private function isInvalidLogPattern($file, $pattern)
     {
-        $pattern = '/laravel-(\d){4}-(\d){2}-(\d){2}.log/';
-
-        return ((bool) preg_match($pattern, $file, $matches)) === false;
+        return ((bool) preg_match("/{$pattern}/", $file, $matches)) === false;
     }
 }